.logo {
    width: 160px;
    height: 50px;
    float: left;
    margin-top: 24px;
    margin-left: 20px;
    background: url(../images/logo-seo.png) no-repeat;
  }

  .logo-title {
    margin-left: 30px;
    float: left;
    height: 34px;
    line-height: 34px;
    font-size: 30px;
    color: #333;
    margin-top: 40px;
  }

  a {
    color: #666;
    text-decoration: none;
  }

  .header {
    width: 100%;
    height: 120px;
    /* background: #ffffff */
    background: url(../images/header.jpg) no-repeat;
  }

  .header .con {
    width: 900px;
    height: 120px;
    margin: 0 auto;
    background: #ffffff
  }

  .nav {
    width: 100%;
    height: 820px;
    background: url(../images/header.jpg) no-repeat 0 -120px;
  }

  .nav .con {
    width: 900px;
    height: 820px;
    margin: 0 auto;
    background: url(../images/wrap_bg.png);
    position: relative;
  }

  body {
    font: 12px/150% tahoma, arial, Microsoft YaHei, Hiragino Sans GB, "\u5b8b\u4f53", sans-serif;
    width: 100%;
    height: 100%;
    background: #c9c9c9;
  }

  .container {
    position: absolute;
    left: 28%;
    top: 35%;
    width: 400px;
  }

  .login-a {
    width: 370px;
  }

  label {
    font-size: 20px;
    color: #333;
  }